If its made legal that doesn't mean that there won't be any more 'private' dealers. Its just that it would be less inticing for the 'gang' lifestyle folks because the $$$ involved in dealing would be severely cut. The public selling of marijuana would actually make weed cheaper in the long run, while the province RAKES in the tax dough.
Serving limits are currently used for medicinal users to prevent them from selling it off for profit.
Off course the mafia made big bucks! They had no competition!
At least we have medical rules to provide some competition now. But just like booze in the old days, if you want the good stuff, at any time, and as much as you want, you get it from the mafia and not from the government!
I am not saying that the law is dumb, or that it doesn't enrich gangsters. I am simply saying that much like the unintended consequence of banning booze making going out to a nightclub much trendier (especially among women who prior to prohibition wouldn't have set foot in a bar) there was also the consequence of the booze becoming super taxed, regulated, and watered down after it was legalised.
Oh, and as a note to Wet re the prohibition of canabis. Much like the prohibition of canabis, there were MANY that were supremely confident that the prohibition of alchohol, which was enshrined in the constituion no less, would ever be repealed.
During the roaring 20s it wasn't a problem. They government didn't need the money and it just lived underground. People put up with the gang violence and the risk of bad product to get their fix.
But once the great depression hung in and beaurocrats were looking somewhere, anywhere, to get some funding, it started to grate on people to be tossing tons of money on something that was clearly not going to go away when they could be instead earning a lot of money instead. That many of the lawmakers are the same baby boomers that started the hippy movement would certainly make it very apt that once again the US can be called a nation of hippocrites with regards to it's marijuana prohibition.
And if history is good at one thing it's repeating itself.